Territory



(No Model.)

W. 0. PARKER. ADJUSTABLE WRENCH.

No. 603,575. Patented May 3,1898.

UNITED STATES PATENT OFFICE.

\VALLAOE 0. PARKER, OF NORMAN, OKLAHOMA TERRITORY.

ADJUSTABLE WRENCH.

SPECIFICATION forming part of Letters Patent No. 603,575, dated May 3,1898.

I Application filed June 24, 1897. Serial No. 642,133. (No model.)

To all whom it may concern:

Be it known that I, WALLACE O. PARKER, residing at Norman, in the countyof Cleveland and Territory of Oklahoma, have invented a new and usefulAdjustable Wrench, of which the following is a specification.

Myinvention relates to adjustable wrenches of the class known asmonkey-wrenches, and has for its objects to furnish a tool of this classwhich shall be capable of being quickly and easily adjusted to suit anysize of nut, can be operated by one hand, leaving the other free anddisengaged, will retain its jaws in any adjustment against greatpressure, and is simple in construction and cheaply manufactured.

With these objects in view my invention consists in the improvedconstruction, arrangement, and combination of parts hereinafter fullydescribed, and afterward specifically pointed out in the claim.

In the accompanying drawings, Figure 1 represents a perspective view ofa Wrench made in accordance with my invention. Fig. 2 represents alongitudinal section through the same on the line 2 2 of Fig. 4. Fig. 3represents a perspective view of the sliding bar and its attachmentsdetached, and Fig. 4 represents a transverse sectional view on the line4 4 of Fig. 2.

Like letters of reference mark the same parts in all the figures of thedrawings.

Referring to the drawings by letters, A is the stationary bar of thewrench, which is provided at its outer end with the stationary jaw A,made integral with the bar. The stationary bar A is also provided on itsinner side with a series of transverse notches, forming its inner sideinto a rack A The jaw A projects slightly beyond the rear side of bar Aand forms a hammer-head A 13 is the sliding bar. It is provided with ajaw B, made integral therewith, and is slidably secured to thestationary bar A by means of yokes B which may be made integral with barB or secured thereto in any suitable or approved manner. Near the jaw Bthe arm 13 is provided with a chamber 0, extending entirely through it,and in this chamber is pivoted a toothed pinion D, which projectsslightly beyond both the inner and outer surfaces-of the bar B.

therein and held in engagement with pinion D by means of a spring E,secured to the bar under the handle end of the pawl.

F is the handle of the wrench, which may be made in any suitable shapeand of any approved material, provided only that it be fashioned toreceive and rigidly hold the stationary bar A, and is provided with achamber F, in which the sliding bar may move.

In manufacturing myimproved wrench the parts are all made separate, andin assembling these parts the following routine is observed: First,thepinion, pawl, and spring are secured in place on the sliding bar;next, this bar, with these attached parts, is brought into operativeposition by sliding its yokes over the inner end of the rigid bar, and,finally, the rigid bar, with the sliding bar and its attached parts inposition thereon, is secured in the handle.

In operating my invention the handle is grasped in the hand, whichbrings the thumb in position to rest on the handle end of the pawl. By aslight pressure of the thumb the point of the pawl is raised out ofengagement with the pinion, leaving the pinion free to rotate. By thefurther movement of the thumb the sliding bar can be moved inward oroutward, causing the jaws to be adjusted nearer together or fartherapart, the pinion acting during the movement of the sliding bar as anantifriction-roller and rendering the movement easier by doing away withthe friction between the two bars.

The advantages of my invention will be obvious from the foregoingdescription. The operator can use the wrenchas readily with one hand asordinary wrenches can be used with both, and while the sliding bar andits jaw are rigidly held in any adjustment their adjustment is quicklyand easilymade by the thumb of the hand in which the wrench is held,leaving the other hand disengaged to be used for any other purpose.

The jaws of this wrench may be faced so I as to adapt them to engageanyshape of nut,

or they may be constructed so that the wrench The combination in anadjustable wrench, of a rigid bar carrying a jaw at its outer end andprovided with a toothed rack on its inner surface, with a sliding baralso provided with a jaw at its outer end, a pinion pivoted in a chamberof said sliding bar projecting beyond both surfaces thereof, a pawlpivoted to the sliding bar and engaging with the pinion, and yokes onthe sliding bar embracing the rigid bar and holding the pinion and rackin engagement, substantially as set forth.

WALLACE O. PARKER.

Witnesses:

W. L. MAUPIN, T. M. UPSHAW.

